4 number lines going from negative 8 to positive 8. Graph A has an open circle at negative 4 with everything shaded to the right of the circle. Graph B has an open circle at negative 6 with everything shaded to the right. Graph C has an open circle at 6 with everything shaded to the left. Graph D has an open circle at 4 with everything shaded to the left. Isolate the variable to solve 4x + 4 > –20. Which number line shows the solution set?

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?